Electric ringer



July 29, 1947. v 0. J. J. BRACKE 2,424,550

ELECTRIC RINGER Filed Feb. 12, 1945 2 Sheets-Sheet l INVENTOR mMAJJE/BICAE ATTORNEY 1947. o. J. J. BRACKE ELECTRIC RINGER July 29 Filed Feb.12, 1943 2 Sheets-Sheet 2 III ilNVENTOR ATTORNEY Patented July 29, 1947ELECTRIC RINGER Oscar J. J Bracke, Antwerp, Belgium,

International N cw York, N.

Application February 12 Inthe Netherla assignor to Standard ElectricCorporation, E, a: corporation of Delaware 1943, Serial No. 475,688 ndsandBelgium- November 15, 1940 6: Glaims.

This invention relates to hell ringers for subscriber telephone sets andmore particularly to improvements in ringers of the type disclosed forexample in Belgian Patent No. 437,365.

A principal object of the inventionis to provide an improved armaturepivot support and attachment for telephone bell ringers and the like.

A feature of the invention relates to a subscribers telephone bellringer wherein the electro magnetic armatureis provided with apivot-bearing support and attachment, whereby the armature can befastened firmly in a fixed member after the gap adjustment with respectto the electromagnet cores has been accurately gauged. In carrying outthis feature, the armature is supported on two fixed pivots each in theform of a rigid rod integrally fastened to the permanent magnet portionof the operating mechanism.

Another feature relates to an improved magnetic assembly for bellringerswherein a permanent magnet ismounted centrally between andsubstantially parallel to a pair of electromagnetic cores, with themagnet and cores integrally fastened, as by welding or soldering, to oneend of a common yoke which forms part of the main-bell support frame.The permanent magnet at its end remote from the bell has integrallyfastened thereto, as by soldering or welding, a pair of perforated orchanneled supports in which can be adjustably mounted and permanentlyanchored, a pair of cooperating armature pivots.

Another feature relates to a bell ringer of the construction abovementioned wherein the bell striker and the retractile spring form anintegral part of the armature assembly.

A further feature relates to an improved bell ringer constructionwherein the vibratory armature assembly can be initially and accuratelyadjusted with respect to the electromagnet cores, and can be firmlyanchored in place without danger of the gap adjustment being disturbedafter long use.

A still further feature relates to the novel organization, arrangementand relative interconnection of parts cooperating to produce a simpleand improved bell ringer.

Other features and advantages not specifically enumerated will beapparent after a consideration of the following description and theappended claims.

The invention will be understood more clearly from the followingdescription based on the accompanying drawing, in which,

Fig. 1 is a plan view of a preferred embodiment of the invention.

Fig. 2 is an elevation view of Fig. 1.

Fig. 3 is a plan view of the main bell supporting frame and magnet andyoke unit according to the invention.

Fig. 4 i an elevation view of Fig. 3.

Fig. 5 is a view, partly sectional, but in enlarged form, showing thearmature and pivot mounting therefor.

Referring to the drawing, the ringer comprises a mainframe I having apair of offset end portionsZ and 3, for fastening toa suitable supportand a pair of intermediate integral lugs 4, 5, for supporting the usualbells 6 and 1 of known construction. In accordance with the invention,the frame orcasting l, which may be of iron or other magnetic material,has its central portion bent at right angles to form a magnetic yoke 8.Central- 1y fastened to yoke 8, for example by soldering or welding, isa permanent bar magnet 9. Also directly attached toyoke 3, for exampleby soldering or welding, are two spaced parallel electromagnetic coresl0 and H, terminating at their forwardends in the usual pole faces l2,l3. The magnet 9 hasrigidly fastened thereto at its forwardend and onopposite faces thereof, by welding or soldering, a pair of members [4,[5, which may be in the form of metal blocks, each having a transverseperforation or channel l6, ll, for purposes to be described. Suitablysupported on the yoke 8 are the electromagnetic windings or coils I8,I9, of known construction. Fitted into the openings l6 and I1, are apair of right-angled rigid rods 20, 2|, (Fig. 5). Preferably, althoughnot necessarily, the portions 22 and 23 of these rods are grooved orotherwise roughened where they fit into the openings l6 and H. Therightangled bent portions 24, 25, of these rods are proportioned so thatwhen the rods are fitted into the said openings i6 and I!, there is agap 26 between the abutting ends. The armature 21 is mounted for pivotalvibration on the rod portions 24 and 25, and for this purpose thearmature has bent-back portions 28, 29, into which are staked, orotherwise fitted against clislodgment, bearing members 36, 3|, whichreceive the pivots 24 and 25 to allow perfect operation of the armaturewithout causing wear of the moving parts. A coupling sleeve 32 overlapsthe grooved or roughened ends 33, 34, of the pivots, and this sleeve canbe a tight fit or can be pressed so as to prevent relative movement ofthe ends 33, 34, after the parts have been assembled. The armature alsohas a vertical extension 35 into which is rigidly fastened the bellstriker arm 36 and also a short member 31 to receive and anchor one endof the retractile spring 38. Suitably supported on the electromagnets isan insulator strip 39 to which the connecting lugs 40, 4|, are attachedso that current may be applied to the windings l8 and I9 in the usualmanner.

The manner of assembly of the ringer mechanism is as follows. The tworods 22 and 23, carrying the armature 21 and the coupling member 32, areinserted and are driven in the respective supports [4 and 15, until therequired air gap is provided between the cores I0, I I, and the armature27. The supports l4 and Hi can then be punched so members 22 and 23 andto maintain the assembled adjustment of the parts. The adjustment of themembers 22 and 23 in the members l4 and therefore, accurately andfinally positions the entire armature and striker assembly in properposition with respect to the magnets and the bells.

While one particular embodiment has been described herein, it will beunderstood that various changes and modifications may be made thereinwithout departing from the spirit and scope of the invention.

What is claimed is:

l. A bell ringer comprising a magnetic yoke, a pair of substantiallyparallel electromagnet cores attached to said yoke, coils on said cores,a permanent magnet located between said cores and also attached at oneof its ends to said yoke, and an armature and bell striker assembly unitpivotally mounted on the other end of said permanent magnet.

2. A bell ringer according to claim 1 in which ivots of said armatureand bell striker assembly unit are movably mounted so as to permitadjustment towards and away from the ends of said electromagnet coresprior to final anchoring of said assembly unit on said permanent magnet.

3. A bell ringer comprising a magnetic yoke, three substantiallyparallel magnets attached at one of their ends in spaced relation tosaid yoke, at least one of said magnets being an electromagnet having acoil; an armature-bell striker as to prevent dislodgment of the.

assembly unit comprising an armature, pivot means on which said armatureis mounted for rotation, and a movable mounting for said pivot means onthe other end of the central magnet, whereby the gap between thearmature and the other two magnets can be adjusted, the lastmentionedmeans also serving to anchor said assembly unit in final adjustedposition.

4. A bell ringer comprising a bell-supporting frame, said frame having aportion bent to form a magnetic yoke, a pair of electromagnets and apolarizing magnet integrally fastened at one end to said yoke insubstantially parallel spaced relation, a pair of substantially L-shapedarmature pivot rods adjustably anchored on the other end of saidpolarizing magnet and positioned so that two arms of said rods are inalignment, an armature pivotally mounted on said aligned arms, and abell striker integrally carried by said armature.

5. A bell ringer according to claim 4 in which the aligned arms of saidrods are held in rigid alignment by a coupling sleeve.

6. A bell ringer according to claim 4 in which said pivot rods, saidsleeve and said armature and striker bar form a unitary assembly, saidpivot rods constituting means to fasten the unit to said polarizingmagnet.

OSCAR J. J. BRACKE'.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 288,202 Bowen Nov. 13, 1883559,274 Fitch Apr. 23, 1896 843,283 Krum Feb. 5, 1907 924,030 BirsfieldJune 8, 1909 2,209,382 Blattner July 30, 1940 2,217,073 Obergfell Oct.8, 1940 FOREIGN PATENTS Number Country Date 163,350 Great Britain 1892

